INSTALLATION INSTRUCTIONS FOR PART 99-7504
APPLICATIONS
Mazda 3
2004-2009
99-7504
KIT FEATURES
• DIN Mount Radio Provision with Pocket
• ISO Mount Radio Provision with Pocket
• Bonus Display Replacement Pocket
• Retains Factory Display For Automatic
Climate Controls
KIT COMPONENTS
A) Radio Housing • B) ISO Brackets • C) Trim Plate • D) Display Replacement Pocket
• E) Display Retention Brackets • F) (2) 3/8” #10 Bolts and (2) #10 Nuts • G) (2) PC-7503 Panel Clips
D
E
C
B
A
WIRING AND ANTENNA CONNECTIONS (Sold Separately)
Harness:
• 70-7903 - Mazda harness 2001-up
Antenna Adapter:
• Not required
G
F
TOOLS REQUIRED:
Small Flat Blade Screwdriver/ Panel Removal Tool
• Phillips Screwdriver
1-800-221-0932
© COPYRIGHT 2004-2009 METRA ELECTRONICS CORPORATION
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99-7504 DASH DISASSEMBLY
MAZDA 3 2004-2009
A
1
2
Disconnect the negative battery ter-
minal to prevent an accidental short
circuit.
Unclip and remove display trim panel
above radio. Tip: Open glove box and
start in middle of panel working
towards drivers side first because last
connection on far passenger side is a
hook. (Figure A)
HOOK
3
4
Remove (2) Phillips screws exposed
at top of radio then unclip and
remove radio. Note: Display is
attached to radio brackets and will be
removed at same time as radio.
(Figure B)
B
Remove (2) Phillips screws on back of
display trim panel securing display
trim then unclip and remove. (Figure B)
Continue to display pocket assembly.
C
REAR VIEW - DISPLAY TRIM PANEL
1
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99-7504 DISPLAY/POCKET ASSEMBLY
DISPLAY BRACKETS/POCKET ASSEMBLY
MAZDA 3 2004-2009
AUTOMATIC CLIMATE CONTROL VEHICLES
A
1
Using the (2) 3/8” #10 bolts and (2)
#10 nuts attach the display retention
brackets to the display unit.
2
3
Remove the (2) Phillips screws in the
sub dash. (Figure A)
Secure the display unit into the sub
dash using the screws removed in the
previous step.
MANUAL CLIMATE CONTROL VEHICLES
B
1
Using the (2) Phillips screws removed
in step 4 of Dash Disassembly secure
the display replacement pocket to the
back of the display trim panel.
(Figure B)
Continue to kit assembly.
2
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99-7504 KIT ASSEMBLY
DIN MOUNT RADIO PROVISION
*Note: Refer also to the instructions included with the aftermarket radio.
A
1
Slide the DIN cage into the Radio
Housing and secure by bending the
metal locking tabs down. (Figure A)
2
3
Slide the aftermarket radio unit into the
cage and secure. (Figure B)
Snap the Trim plate into the Radio
Housing. (Figure B)
4
Attach the (2) PC-7503 panel clips to
the rear of the radio housing. (Figure C)
B
Continue to final assembly.
C
3
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99-7504 KIT ASSEMBLY
ISO DIN MOUNT RADIO PROVISION
*Note: Refer also to the instructions included with the aftermarket radio.
A
Mount the ISO Brackets to the after-
market radio using the screws sup-
plied with the radio. (Figure A)
1
2
3
Slide the radio into the radio housing
until it snaps into place. (Figure B)
Attach the trim plate supplied with
the kit to the front of the radio hous-
ing assembly. (Figure B)
4
Attach the (2) PC-7503 panel clips to
the rear of the radio housing. (Figure C)
B
Continue to final assembly.
C
4
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99-7504 FINAL ASSEMBLY
FINAL ASSEMBLY
A
B
(A) Strip wire ends back 1/2"
B) Twist ends together
C) Solder
D) Tape
C
D
Locate the factory wiring harness in the dash. Metra recommends using the
proper mating adapter and making connections as shown. (Isolate and individ-
ually tape off the ends of any unused wires to prevent electrical short circuit.)
1
2
3
Re-connect the negative battery terminal and test the unit for proper operation.
Reassemble radio and dash assemblies in reverse order of disassembly.
Note: When inserting the 99-7504 into the sub dash be aware of the locations
pointed out in Figure B
.
If the 99-7504 does not snap in correctly the result will be a noticeable gap on each
side of the installation kit. (Figure C)
B
C
5
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FINAL WIRING CONNECTIONS
Make wiring connections using the EIA color code chart shown below and the instructions included with the
head unit. Metra recommends making connections as shown below; Strip, Splice, Solder, Tape. Isolate and
individually tape off ends of any unused wires to prevent electrical short circuit.
METRA / EIA WIRING CODE
12V Ignition / Acc. . . . . . . . . . Red
Right Front (+) . . . . . . . . . . . . Gray
12V Batt / Memory. . . . . . . . . Yellow
Ground. . . . . . . . . . . . . . . . . . Black*
Power Antenna. . . . . . . . . . . . Blue
Right Front (-). . . . . . . . . . . . . Gray/ Black
Left Front (+) . . . . . . . . . . . . . White
Left Front (-). . . . . . . . . . . . . . White / Black
Right Rear (+) . . . . . . . . . . . . Violet
Amp Turn-On . . . . . . . . . . . . . Blue / White
Amp Ground. . . . . . . . . . . . . . Black / White
Illumination . . . . . . . . . . . . . . Orange
Dimmer . . . . . . . . . . . . . . . . . Orange / White
Right Rear (-) . . . . . . . . . . . . . Violet / Black
Left Rear (+) . . . . . . . . . . . . . Green
Left Rear (-) . . . . . . . . . . . . . . Green / Black
*NOTE: When a Black wire is not present, ground radio to vehicle chassis.
All colors may not be present on all leads due to manufacturer’s specifications.
1-800-221-0932
REV. 06/26/09 © COPYRIGHT 2004-2008 METRA ELECTRONICS CORPORATION INST99-7504
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